[PATCH v3] serial: mps2-uart: Check for error irq
From: Jiasheng Jiang <hidden>
Date: 2021-12-23 12:14:47
Also in:
linux-arm-kernel, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Because of the possible failure of the platform_get_irq(), it should be
better to check it to avoid the use of error irq.
Fixes: 041f031def33 ("serial: mps2-uart: add MPS2 UART driver")
Signed-off-by: Jiasheng Jiang <redacted>
---
Changelog:
v2 -> v3
*Change 1. Using error variable to check.
*Change 2. Add new commit message.
---
drivers/tty/serial/mps2-uart.c | 26 ++++++++++++++++++++++----
1 file changed, 22 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c
index 587b42f754cb..24a52300d8d9 100644
--- a/drivers/tty/serial/mps2-uart.c
+++ b/drivers/tty/serial/mps2-uart.c@@ -584,11 +584,29 @@ static int mps2_init_port(struct platform_device *pdev, if (mps_port->flags & UART_PORT_COMBINED_IRQ) { - mps_port->port.irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + + mps_port->port.irq = ret; } else { - mps_port->rx_irq = platform_get_irq(pdev, 0); - mps_port->tx_irq = platform_get_irq(pdev, 1); - mps_port->port.irq = platform_get_irq(pdev, 2); + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + + mps_port->rx_irq = ret; + + ret = platform_get_irq(pdev, 1); + if (ret < 0) + return ret; + + mps_port->tx_irq = ret; + + ret = platform_get_irq(pdev, 2); + if (ret < 0) + return ret; + + mps_port->port.irq = ret; } return ret;
--
2.25.1